What can scientists analyze to get a better understanding of how plants and animals evolved from a common ancestor? (1 point) O DNA molecules
o petrified bones and imprints of plants
o life cycles and behaviors
o vertebrate embryos

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

Depending on the organism the number of in a cell may change